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davinci: da850-evm: UI expander gpio_set_value can sleep, use _cansleep 

When the RMII PHY on the UI board is enabled with CONFIG_DA850_UI_RMII
then then following will be printed to the console when warnings are
also enabled:

WARNING: at drivers/gpio/gpiolib.c:1567 __gpio_set_value+0x4c/0x5c()
Modules linked in:
[<c002c6ac>] (unwind_backtrace+0x0/0xf8) from [<c003b48c>] (warn_slowpath_common+0x4c/0x64)
[<c003b48c>] (warn_slowpath_common+0x4c/0x64) from [<c003b4c0>] (warn_slowpath_null+0x1c/0x24)
[<c003b4c0>] (warn_slowpath_null+0x1c/0x24) from [<c01aed60>] (__gpio_set_value+0x4c/0x5c)
[<c01aed60>] (__gpio_set_value+0x4c/0x5c) from [<c0033bd4>] (da850_evm_ui_expander_setup+0x1e4/0x2
44)
[<c0033bd4>] (da850_evm_ui_expander_setup+0x1e4/0x244) from [<c02e2e1c>] (pca953x_probe+0x1f8/0x29
0)
<snip>

Traced the WARN_ON to the gpio_set_value(rmii_sel,0) call in
da850_evm_setup_emac_rmii. Replacing the call with the _cansleep variant
results in no more warning. Also replacing the gpio_set_value calls in the
teardown function.

Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca>
Reviewed-by: Chris Cordahi <christophercordahi@nanometrics.ca>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Ben Gardiner 2010-11-15 09:42:52 -05:00 committed by Kevin Hilman
parent 12cdd3d719
commit 47e7cb148a
1 changed files with 4 additions and 4 deletions
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8
arch/arm/mach-davinci/board-da850-evm.c
View File

@ -266,7 +266,7 @@ static inline void da850_evm_setup_emac_rmii(int rmii_sel)
struct davinci_soc_info *soc_info = &davinci_soc_info;
soc_info->emac_pdata->rmii_en = 1;
gpio_set_value(rmii_sel, 0);
gpio_set_value_cansleep(rmii_sel, 0);
}
#else
static inline void da850_evm_setup_emac_rmii(int rmii_sel) { }
@ -325,9 +325,9 @@ static int da850_evm_ui_expander_teardown(struct i2c_client *client,
unsigned gpio, unsigned ngpio, void *c)
{
/* deselect all functionalities */
gpio_set_value(gpio + 5, 1);
gpio_set_value(gpio + 6, 1);
gpio_set_value(gpio + 7, 1);
gpio_set_value_cansleep(gpio + 5, 1);
gpio_set_value_cansleep(gpio + 6, 1);
gpio_set_value_cansleep(gpio + 7, 1);
gpio_free(gpio + 5);
gpio_free(gpio + 6);